| 摘要 |
A baseball training device for use in improving batting and/or pitching skills, particularly launching skills while batting and avoid rushing while pitching, the device comprising an elongated member of at least a length to extend about the knee of a wearer and forming a loop, and a signaling device secured to the elongated member, the signaling device adapted to generate a signal when the knee of the wearer with the training device bends that knee toward the other knee of the wearer.
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